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Family	00.101.  Dicistroviridae
	Taxonomic Structure of the Family
	Family         00.101. Dicistroviridae Genus                      00.101.0.01. Cripavirus

List of Species Demarcation Criteria in the Genus

List of Species in the Genus

The ICTVdB virus code and the viruses. Official virus species names are in italics. Tentative virus species names, alternative names ( ), isolates, strains, serotypes, subspecies, or rejected names are not italicized.
 
Virus codes, virus names, genome sequence accession numbers [ ] and assigned abbreviations ( ), are:

Species, their serotypes, strains and isolates

Tentative Species in the Genus

None reported in 8th ICTV Report, the following new species has been proposed to the ICTV Study Group in 2005.

List of Unassigned Viruses in the Family

Similarity with other Taxa

Members of the Dicistroviridae have similarities to other viruses with positive-sense ssRNA genomes within the "picornavirus-like superfamily" (Comoviridae, Iflavirus, Picornaviridae, Potyviridae and Sequiviridae). For instance the gene order of the non-structural proteins is the same for all groups within this assemblage i.e. Hel-Pro-RdRp. Like other isometric members of this "superfamily" for which the structure is known, CrPV has a pseudo T=3 symmetry. However, the members of the family Dicistroviridae can be distinguished from the members of the taxa Iflavirus, Picornaviridae and Sequiviridae by the organization of the genome i.e. having the structural proteins at the 3'-end of the genome rather than the 5'end and by the presence of the IGR, and they can be separated from members of the family Comoviridae by having only a single rather than two genomic segments.

There are a large number of RNA-containing viruses of approximately 30 nm in diameter that have been described from insects for which the taxonomic status is not known. Many of these have characteristics that are superficially similar to members of the family Dicistroviridae and have been described. In the literature as either picornaviruses or picorna-like viruses. While many of these viruses remain relatively uncharacterized, for Acyrthosiphon pisum virus (APV) [AF14514], the complete genome has been sequenced.

This virus has a structural and organization which is quite different from either the members of the family Dicistroviridae or of the recently established unassigned genus, Iflavirus. Among the remaining 20 or so picorna-like viruses of insects there are undoubtedly a number of viruses that will eventually be members of the family Dicistroviridae but they are currently classified as unassigned viruses.

Derivation of Names

Cripa: sigla from the name of the type member of the genus, Cricket paralysis virus
Dicistro: sigla from the characteristic di-cistronic arrangement of the genome.

References

Collated from VIIIth ICTV Report

Contributed by

Christian, P., Carstens, E., Domier, L., Johnson, J., Johnson, K., Nakashima, N., Scotti, P. and van der Wilk, F.

Version 4 is based on Virus Taxonomy, Classification and Nomenclature of Viruses, 8th ICTV Report of the International Committee on Taxonomy of Viruses. Fauquet, CM, Mayo, MA, Maniloff, J, Desselberger, U, and Ball, LA (EDS) (2005) Elsevier/Academic Press, pp. 1259.

Additional References

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